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285 Regina (A889 PA)
Classification: Main-belt Asteroid          SPK-ID: 2000285
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2046300363057185 3.9811e-08  
a 3.086076322147802 1.1583e-08 au
q 2.454572412304479 1.2111e-07 au
i 17.61641305945253 4.0887e-06 deg
node 311.228754761773 1.275e-05 deg
peri 14.27962099952591 1.5518e-05 deg
M 68.56404973139232 9.673e-06 deg
tp 2458823.360187315543
(2019-Dec-05.86018732)		 5.2376e-05 TDB
period 1980.197101809195
5.42		 1.1149e-05
3.052e-08		 d
yr
n .1818000842800387 1.0235e-09 deg/d
Q 3.717580231991124 1.3953e-08 au
   Orbit Determination Parameters
   # obs. used (total)      2746  
   data-arc span      39955 days (109.39 yr)  
   first obs. used      1911-09-01  
   last obs. used      2021-01-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39073  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:45:11  

Additional Information
 Earth MOID = 1.44351 au 
 Jupiter MOID = 1.63005 au 
 T_jup = 3.123 
[ show covariance matrix ]

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.85   n/a E2021B10  
diameter diameter 47.156 km 0.310 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 9.542 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Pilcher, F.; Benishek, V. (2010) Minor Planet Bull. 37, 50.]
geometric albedo albedo 0.050   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

285 Regina (A889 PA)          Discovered 1889-Aug-03 by Charlois, A. at Nice
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)		 Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1908-Aug-14 04:43 00:02 Jupiter 1.71019604816951 1.71019490638497 1.71019718995599 4.44937384321249 4.3366313600364 2418167.696436875 1.62539399232126 149.016503030963 42.6474166581062 74.4757981213225 3972024.56074685 T 46 CATAB v2.0f-lin.ifort 2021-Feb-24 00:45:18 2021-Feb-24 00:45
1918-Sep-12 18:52 00:02 Jupiter 1.98018032589932 1.98017883465555 1.98018181716504 4.09230638646927 3.98641081369118 2421849.286457344 1.80464293939016 353.793946041705 16.9275931293027 -77.5966082741195 3779462.06653558 T 46 CATAB v2.0f-lin.ifort 2021-Feb-24 00:45:18 2021-Feb-24 00:45
1968-Aug-13 15:58 < 00:01 Jupiter 1.99223269850543 1.99223176098872 1.99223363602259 4.09650951405299 3.9913738634785 2440082.165341791 0.835482859914833 123.223419160618 43.3134442893364 -79.9753382129396 3715871.84017929 T 46 CATAB v2.0f-lin.ifort 2021-Feb-24 00:45:18 2021-Feb-24 00:45
1978-Sep-25 19:52 < 00:01 Jupiter 1.70245660579028 1.70245612291199 1.7024570886737 4.47415304246843 4.36153485511788 2443777.327566998 0.574128655390441 203.490818324822 14.2805328958704 -84.5972790779263 4176669.09864334 T 46 CATAB v2.0f-lin.ifort 2021-Feb-24 00:45:18 2021-Feb-24 00:45
2038-Sep-02 13:16 < 00:01 Jupiter 1.62727628474754 1.62727592335371 1.62727664614303 4.50506117529381 4.38800013780126 2465669.052453115 0.44137212092921 115.084224063786 11.1158281175537 -83.211991707873 4210323.90977027 T 46 CATAB v2.0f-lin.ifort 2021-Feb-24 00:45:18 2021-Feb-24 00:45
2098-Aug-14 05:21 00:01 Jupiter 1.782178403868 1.78217740299996 1.78217940473765 4.32382973497809 4.21247625350544 2487564.722999099 1.42264812173709 142.888605932439 39.2695188325872 76.1341134595524 3950031.47713224 T 46 CATAB v2.0f-lin.ifort 2021-Feb-24 00:45:18 2021-Feb-24 00:45
2108-Sep-25 13:44 00:02 Jupiter 1.88502768311428 1.88502614652077 1.88502921974989 4.37179868199025 4.26777919818113 2491259.072473926 1.7611228707055 469.674585006059 16.1591630161083 -80.6825522546963 3977410.85931668 T 46 CATAB v2.0f-lin.ifort 2021-Feb-24 00:45:18 2021-Feb-24 00:45
2168-Sep-22 12:46 00:02 Jupiter 1.66075246276786 1.66075138981648 1.66075353577635 4.52905073807322 4.41500327413795 2513171.032167981 2.41130764731108 509.503242647213 10.8410713385902 -84.1421726861035 4142319.07876259 T 46 CATAB v2.0f-lin.ifort 2021-Feb-24 00:45:18 2021-Feb-24 00:45

Alternate Designations
 A889 PA = 1951 AC1 = A911 QJ 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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